Dropbox, which is a leading web-based cloud storage and collaboration platform, raised $756 million by offering 36 million shares at $21, above the range of $18 to $20. Dropbox plans to list on the Nasdaq under the symbol DBX. Goldman Sachs, J.P. Morgan, Deutsche Bank, Allen & Company, BofA Merrill Lynch, RBC Capital Markets, Jefferies and Macquarie Capital acted as lead managers on the deal.